FLOOD02918

• County: Denver
• Community: Denver
• Stream Name: South Platte River
• Basin: South Platte
• Title: Estimation of Flood Depth-Damage Curves for Residential, Commercial and Industrial Properties in the Denver Region
• Date: 10/1/1977
• Prepared For: CWCB
• Prepared By: Wayne J. Grahm ‎(Master of Science Candidate at CSU)‎
• Floodplain - Doc Type: Educational/Technical/Reference Information

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structure,

A 1960 study (Homan & Waybur, 1960) in which surveys were obtained

for 248 residential properties in Contra Costa, Solano, and San Joaquin

Counties in 1958 developed relationships between market value of contents

and market value of the structure. Later,(Grigg & Helweg, .1975) from their

)

data, a regression equation was developed with the following results:

100 Vvc = 42.0818 - ,00072 V
s s

where

Vc = market value of contents

Vs = market value of structure in dollars

The standard error was 15,29 and the coefficient of correlation was

,32 revealing that contents vary considerably in value to that of the

structure, The 1958 California data does conclusively show that the value

of contents, as a percentage of structure value drops as the value of the

structure increases. Because the above equation is based upon1958 prices,

it gives a content valuc of zero and then. yield negative content values

when the structure value goes to $58,447 and beyond. Before using the

1958 data, it would be necessary to update the structure values to today's

price level. If it can be assumed that the value of contents and struc-

ture both increase the same percentage, the information should still be

usable. A new regression equation should then be developed.

A flood study conducted in 1964 by a Federal Agency used 32% of the

structure value to compute the value of contents. Another Federal Agency

feels that 30% of the structure value is a good approximation for the

value of the contents. (Grigg & Helweg, 1975) In a study done in the

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